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for absorbing so 2 Loaded ether-based bis-imidazole ionic liquid and its preparation method and use method
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A technology of ionic liquid and biimidazole, which is applied in the field of loaded ionic liquid, can solve problems such as hindering the development of industrialization, difficulty in preparation of functional group embedding, and high viscosity
Inactive Publication Date: 2018-02-06
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
Ionic liquids are substances that can be designed and modified. Designing target ionic liquids that meet the requirements is usually a difficult research point. In order to make ionic liquids have or enhance their functionality, it is necessary to embed functional groups in the structure of conventional ionic liquids. However, the intercalation preparation of functional groups is often difficult. In addition, ionic liquids have high viscosity and large gas-liquid mass transfer resistance in the desulfurization process, which hinders their industrial development in desulfurization applications.
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Embodiment 1
[0054] This example relates to a set of 2 The supported ether-based bis-imidazole ionic liquid, as shown in the following table:
[0055]
[0056] Taking the supported ether-based biimidazole ionic liquid of Example 1.2 as an example, the following preparation method is adopted:
[0057] Step 1, synthesizing ionic liquid two-(3-ethylene glycol methyl ether base-1-imidazole) butylene dimesylate, proceeds according to the following steps:
[0058] a. Synthesis of 1,4-bis-imidazolidine:
[0059] a1, 1mol (68g) imidazole and 1mol (40g) sodium hydroxide are added in the flask, add 200ml solvent dimethyl sulfoxide (DMSO), control temperature 65 ℃, stir reaction, treat that sodium hydroxide dissolves completely and obtain yellow solution;
[0060] a2. Add 0.5mol (108g) 1,4-dibromobutane dropwise to the yellow solution, and stir and react at 65°C for 4h;
[0061] a3. After cooling the reaction system in step a2 to room temperature, pour the reaction product into a beaker filled ...
Embodiment 2
[0084] This embodiment relates to loading type ether-based bisimidazole ionic liquid to SO 2 evaluation of the absorption properties.
Embodiment 21
[0086] This embodiment relates to the load-type ether-based biimidazole ionic liquid of embodiment one and is used for absorbing SO 2 When , the absorption capacity is evaluated by the influence of absorption temperature.
[0087] The absorption experiment is as follows: put the accurately weighed ether-based biimidazole ionic liquid into the absorption tube, and inject the gas containing SO at a gas flow rate of 20mL / min. 2 The gas, the absorption pressure is 0.1MPa, the tail gas is passed into the sodium hydroxide solution, and the SO2 is measured by weighing method 2 The absorption capacity in the ionic liquid, after the absorption reaches equilibrium, calculates the SO 2 The absorption in this ionic liquid, the result is shown in the following table:
[0088]
[0089] As can be seen from the results in the table above, the load-type ether-based bis-imidazole ionic liquid of the present invention is in SO 2 The absorption performance is affected by the number o...
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Abstract
The invention relates to a supported type ether based bis-imidazole ionic liquid for absorption of SO2. The load type ether based bis-imidazole ionic liquid is prepared by loading ether based bis-imidazole ionic liquid to silica gel, diatomite or activated carbon, and the obtained load type ether based bis-imidazole ionic liquid combines both advantages of ether based bis-imidazole ionic liquid and a porous material carrier, greatly improves the SO2 absorption efficiency, effectively reduces the absorption operation cost of SO2, has no secondary pollution, and is green and environment friendly, thus being an efficient SO2 removal absorbent with good industrial application prospect. The preparation method involved in the invention has the advantages of simple process, high preparation process stability and good repeatability.
Description
technical field [0001] The invention relates to a loaded ionic liquid, in particular to a 2 The supported ether-based bis-imidazole ionic liquid, meanwhile, the present invention also relates to the preparation method and use method of the supported ether-based bis-imidazolium ionic liquid. Background technique [0002] With the development of industry, my country's air pollution is becoming more and more serious, among which SO 2 The harm is particularly significant, SO 2 Compatible with O in air 2 Combines with water to form H 2 SO 4 , Acid rain is formed with the rainwater falling, which affects the growth of plants, corrodes buildings, and seriously affects people's production and life. Flue gas desulfurization is the main industry to suppress SO 2 Emission methods, the current flue gas desulfurization methods include wet, dry and semi-dry desulfurization. Among them, the limestone / gypsum method is the most widely used wet desulfurization method, but there are man...
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